Can Gnabry play against Swansea? Do Arsenal have an option?

After Arsene Wenger rested most of his first choice Arsenal players for the league cup trip to West Brom, the Gunners should be able to field a well rested first team for the visit to the Liberty Stadium to face Swansea City on Saturday. This is great news for a squad depleted by injury, but there are a couple of things still concerning me. Firstly, our Big F**king German Per Mertesacker played the whole 120 minutes and was on the end of a heavy challenge. So I assume that he will be rested against Swansea, because we can’t risk him picking up an injury because his body has not recovered properly. With Sagna and Vermaelen, this is not too much of a problem, but it does break up the partnership, and Swansea could cause us problems at the back. The other worry is Serge Gnabry. The young German had a great league debut against Stoke, but was not as effective at West Brom, but that is not what’s worrying me. It’s the fact that he played 120 minutes on the back of that debut. Is he match fit enough to play a third game in a six days? He is young, but hasn’t been playing regularly so is not used to it. Hopefully this will not be a problem, because I am struggling to think of a decent alternative. Gnabry is already covering for injuries, so who covers for him? Miyaichi? Akpom? Eisfeld? I guess we will have to wait and see…